Research of Solid Particles Circulation Based on a New Feedback Valve of Internal Circulating Fluidized Bed

Theory calculation method and cold experiment are introduced based on a new J-type Loop Seal of two chambers internal circulating fluidized bed in the paper. Theory calculation includes equivalent model based on J-type Loop Seal experimental device and setting up correlations of solid particles circulation. Cold experiment includes building the experimental device and measuring related parameters. And relationships between lateral blow and three key parameters determining solid particle circulation are discussed on emphasis in cold experiment. The experimental results show that when the left or right lateral blow is fixed, the height difference of two chambers under operation is in linear relationship with another lateral blow. The dynamic head of feedback valve under operation is only in linear relationship with the left lateral blow, and is hardly affected by the right lateral blow; the resistance coefficient in the feedback valve is in linear relationship with reciprocal of right lateral blow. Experimental values are in good agreement with the theory calculation values for solid particle circulation, with the relative error less than 10%. Thus the theory calculation method and cold experiment provide a reliable reference basis for operation and hot experiment of feedback valve of internal circulating fluidized bed. What’s more, we also discussed few related patents.